Erebos is Basin, Mesec is the Throat.
Though I do think it would make sense that patron characters could not contract the disease - however, characters from the Basin who did not contract BFB more than likely did not get it because our post count award for the month was immunity to disease.
This month there is also the reduced chance of catching disease among AB characters, which I think should be remembered as its probably keeping a lot of unicorns from catchin' the GLL.